Broiler.



GfG. GRONWALL.

BROILER.

APPLICATION FILED MARA, 1911.

1,010,026' A l Pateted N0v.28, 1911.

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COLUMBIA PLANUGRAIH coI.vvAshnwnToN.n.1:4

C. G. CRONWALL.

BROILER.

APPLICATION FILED 11.111,4, 1911.

1,010,026, y Patented 111011.28, 1911.

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CDLUMBIA PLANOGRAPH C0.. WASHINGTON, D. c.

CARL G. CRONWALL, OF CHICAGO, ILLINOIS.

BROILER.

Specication of Letters Patent.

Application filed March 4, 1911.

Patented Nov. 28, 1911. Serial No. 612,217.

To all whom it may concern:

Be it known that I, CARL G. CRONWALL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Broilers, of which the following is a specification.

This invention relates to improvements in an apparatus wherein gas, as fuel, is employed for broiling meats, and while it is more particularly intended and designed for use in the kitchens of restaurants and hotels, and in connection with a superimposed roasting-oven, and is so shown in the drawings, and will be hereinafter described, yet it is applicable for use, with slight or immaterial changes, in connection with gas ranges of the ordinary or any well known construction and in the kitchens of private houses, and it consists in certain peculiarities of the construction, novel arrangement and operation, of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed.

The principal object of the invention is to provide a broiling apparatus of the above named general character which shall be simple and inexpensive in construction, compact in form, strong, durable and eficient in operation, and so made that parts thereof may be readily and bodily removed from the main or supporting frame for the purpose of cleaning, or otherwise, and easily inserted in operative position, or adjusted at nicely different distances, either wholly or partially from the burner of the apparatus, to the end, that a plurality of pieces of meat, of different thicknesses, may be broiled at the same time, that is to say, that one or more thin pieces of meat requiring a short time only to broil it or them, may be cooked at the same time, and on the same grid-iron, with one or more thicker pieces of meat which will require a longer time to cook or which it may be desirable to cook slowly.

A further and very important object of the invention is to provide simple and efIi cient means for mixing air and gas as it is supplied to the burner, whereby the combustion will be more perfect thus economizing in fuel and reducing to a minimum the production and escape of smoke.

Still another object of the invention is to prevent back firing of the burners by reason of the ignition of grease cooked or exuding from the meat on the grid-iron therebelow.

A still further object is to provide means to permit of the withdrawal from the main or supporting frame of the gang burner without interference with or obstruction by the gas supplying nozzles or jets.

umerous other objects and advantages of the invention will be disclosed in the sub joined description and explanation.

In order to enable others skilled in the art to which the invention pertains, to make and use the same, I will now proceed to describe it referring to the accompanying drawings in which- Figure l, is a perspective view of a broiling apparatus embodying the invention showing the parts mounted on the main or supporting frame and in connection with a roasting-oven. Fig. 2, is a side sectional view of Fig. l, showing by continuous lines, the apparatus in position on the supporting frame therefor and by dotted lines, the gang burner in the act of being withdrawn from the frame. In this view the detlector which lies horizontally under the roasting-oven is shown in its most elevated position. Fig. 3, is a detached perspective view of one of the mixers for the burner. Fig. 4, is a perspective view of a portion of the deflector and a part of the iioor of the oven showing the means for supporting the former on the latter. Fig. 5, is an enlarged perspective view of a portion of the gridiron of the broiling apparatus. Fig. 6, is a longitudinal sectional view of one of the burner tubes, one of the mixers which communicates therewith and one of the gas jets or nozzles used for supplying gas to the mixers and burner tubes. Fig. 7, is a plan view of a portion of the burner, a part of the header therefor and portions of the frame on which the burner tubes are mounted. Fig. 8, is a detached perspective view of the front portion of the frame or support for the burner tubes, and Fig. 9, is a similar view of the rear support therefor.

Like numerals of reference refer to corresponding parts throughout the different views of the drawings.

The reference numeral 12, designates the main or supporting frame for the broiling apparatus, which frame is herein shown as consisting of a hollow metal casing somewhat similar to a gas stove, and having its front portion open for the insertion and withdrawal of the grid-iron. The upper portion of the supporting frame or casing 12, is provided with an oven 13, which may be used for roasting purposes or for keeping articles of food warm. As shown in Figs. 1 and 2, of the drawings, the front portion of the supporting frame or casing 12, is provided at each of its sides with a horizontal step 14, and the front portion of the oven is set back, or located some distance from the front of the steps 14, thus affording space for the location of the header and front part of the burner, without the same projecting materially beyond the front of the casing. The bottom 15, of the oven is provided near each of its side edges with a downwardly and inwardly extended bracket 16, each of which extends from the front portion of the oven to the rear portion thereof and are used in conjunction with similar brackets 17, located on the upper surface of the deflector 18, which is of sufficient size to fit snugly but movably between the walls of the casing 12, below the oven 13, and when in position extends from the front portion of the oven to the rear part thereof, as is clearly shown in Fig. 2, of the drawings. By reference to Fig. 4, it will be seen and understood that each of the brackets 16, has on its lower portion a flange 16, which lies in substantially a horizontal position, and that each of the brackets 17, is provided at its upper part with a flange 17a, which is also disposed substantially in a horizontal position and said flanges are adapted to engage each other as shown in the last named figure, when the deiector is in its lowermost position. By this arrangement it is apparent that the deiector will be supported in such a manner as to allow for expansion and contraction incident to the heating and cooling of the parts. The deflector consists of a plate or sheet 18, of asbestos, or other suitable non heat conducting material, and has secured on its lower surface a fluted or creased piece of sheet metal 19, as is clearly shown.

Secured to the front portion of each side of the casing or frame 12, at a suitable distance above the steps 14, thereof, is a bracket 20, each of which extends forwardly and horizontally, and has mounted on its outer portion a header 21, which may have communication with a supply of gas, not shown, and is provided near one of its ends with a valve 22, to regulate and shut off the flow of gas to the header. As shown, the header is provided with a series of gas jets or nozzles 23, which project forwardly then downwardly in a rearwardly inclined direction as is clearly shown in Figs. 2, and 6, of the 1f it is desired, one or more of the jets or nozzles 23, may be provided with a valve 24, for controlling the flow of gas through the same, but ordinarily this will not be required.

Located horizontally on the inner surface of each side of the casing or supporting frame 12, and below the steps 14, thereof are a series of ledges 25, which are placed one above the other at slight distances apart to receive the Hanges or lateral projections 26, on the side pieces 27 of the frame of the grid-iron, which is designated as a whole by the reference numeral 28, and is provided with a series of grate bars or rods 29, which extend from the front part of the grid-iron to the rear end thereof and are employed for supporting the meat to be broiled. By providing each side 27, of the grid-iron, with a thin lateral projection which in the present instance is shown as a flange, it is apparent that the ledges 25, on the sides of the frame or casing 12, may be placed much closer together and yet receive the flanges or projections 26, on the grid-iron than if the entire sides 27 of said iron were of the greater thicknesses. By thus forming the grid-iron another advantage is attained, and that is, the flanges or projections 26, will overlap the ledges 25, to such an extent that one side of the gridir0n may be placed on one of the upper ledges 25, and the other side or fiange thereof placed on one of the lower ledges of the supporting frame, thus causing the grid-iron to assume an inclined position as shown by dotted lines in Fig. 1, when it is apparent that thick pieces of meat may be placed on the lower portion of the iron and thinner pieces on the part of said iron nearer the burner, or vice-versa, thus subjecting the pieces of meat to the necessary amount of heatrequired for cooking the saine quicklyT or slowly.

Located transversely on the steps 14, of the supporting frame is a support for the mixers 30 and the front portion of the burner tubes, which support, is designated as a whole by the reference numeral 32, and consists of a forwardly and upwardly extended plate or portion 33, which has at its free edge a downturned flange 34, for the purpose to be presently explained, and a horizontally disposed portion 35, having at each of its ends a downturned part 36, to rest on the outer surface of the sides of the casing or frame 12. At the rear portion of the body part 85, of the burner support is provided an upright box-like portion 37, the vertical wall of which is provided with openings 38, to receive the front ends of the burner tubes 31, each of whichis provided on its lower surface with a series of perforations 39, through which the mixture of air and gas may escape and thereby be directed downwardly toward the grid-iron. The rear end of each of the burner tubes 31, is preferably flattened as at 40, and may be secured by means of screws or bolts 41, to the upper portion of the rear support 42, for said burner tubes, which rear support is preferably of the shape shown in Figs. 2, 6, and 7, of the drawings, that is to say, Z- shaped in cross section, and is of suflicient length to rest at each of its ends on the uppermost ledges 25, on the side of the supporting frame or casing, within which, it will be understood the support 42, is transversely and movably located.

Each of the mixers 30, is herein shown as being formed of a single tubular piece having an upward inclination and provided at its end adjacent to the box-like portion 37, of the support 32, with an apertured plate or flange 43, adapted to be secured to the upright wall of said box-like portion so that the tubular portion of the mixer will com municate with the front end of one of the burner tubes. Each of the mixers has its upper end open and is provided on its upper surface with a longitudinally extended slot 44, which slots are preferably tapered toward their lower ends, and by preference terminate a slight distance above the horizontal portions of the mixers, the inclined portions of which rest on the upper surface of the inclined plate 33, of the support 32, and may be secured in such positions by means of screws 45, or otherwise.

From the foregoing and by reference to the drawings, .it will be readily understood and clearly seen, that the parts may be assembled in the following manner: The deflector 18, can be slid into position by placing the flanges 17 a, of the brackets 17, of the deflector, in position on the flanges 16a, of the brackets 16, on the lower portion or floor 15, of the oven, after which the rear support 42, for the burner tubes 31, can be placed on the uppermost ledges 25, when by sliding it and the burner tubes backwardly it is apparent that the body portion 35, of the support 32, for the front part of the burner tubes and the mixers will rest on the steps 14, of the frame, just below and a little in front of the front wall of the oven. When thus placed it is apparent that the downwardly and rearwardly deflected portions of the gas jets or nozzles 23, will' lie in the slotted portions 44, of the mixers 30, yet so as to have their discharging ends located at some distance from the lower ends of said slots, so that when the gas is discharged through said jets or nozzles, which will be done with considerable force on account of the pressure of the gas, the inflowing jets of gas will draw in an abundance of air not only from the rear of the nozzles 23, but above and in front of the same, thus producing a most thorough mixture for the burner tubes 31, from which it will pass out through the perforations 39, on the lower surface thereof and be ignited. As the plate 33, is extended below the mixers 30, and has at its upper edge a downsturned flange 34, it is evident that back firing of the burners and mixers incident to flames caused by burning grease on the grid-iron will be prevented. It is further obvious that by my improvements the gang burner including a plurality of burner tubes 31, and mixers 30, can be removed without any interference with or obstruction by the other parts of the apparatus.

Having thus fully described my invention, what I claim as new and desire to secure by Letters-Patent is- 1. In a broiling apparatus, the combination with a supporting frame having on the inner surface of each of its sides a horizontally disposed ledge, of a burner consisting of a plurality of perforated burner-conduits, a mixer communicating with each of said conduits, and having an elongated opening, a gas discharge nozzle located in each of said openings and disposed longitudinally with respect thereto, a support transversely connected to the rear portions of the burnerconduits and movably supported on the ledges of the supporting frame, a support for the front portion of the burner consisting of a transversely disposed member supported at its ends on the supporting frame and connected to the burner-conduits, and a plate extended from the lower front portion of the last named support upwardly and outwardly therefrom beneath the mixers and having at its outer edge a downturned flange.

2. In a broiling apparatus, the combination with a supporting frame having a horizontally disposed partition in its upper port-ion, of a bracket angular in cross section secured to the lower surface of said partition near each of its side edges, a def-lector having on the upper surface near each of its side edges a bracket angular in cross section' to engage the brackets on said partition.

3. In a broiling apparatus, the combination with a supporting frame having on the inner surface of each of its sides a horizontally disposed ledge, of a burner consisting of a perforated burner conduit, a, mixer communicating with said conduit at one of its ends and having an elongated slot in its upper surface, a gas discharge nozzle located in said slot and disposed longitudinally with respect thereto, a support transversely connected to the rear portion of the burner conduit and movably supported on the ledges of the supporting frame, a support for the front portion of the burner consisting of a transversely disposed member supported at its ends on the supporting frame and connected to the burner conduit, and a plate extended from the lower front por tion of the last named support upwardly Copies of this patent may be obtained for five cents each, by addressing the ings and disposed longitudinally With respect thereto, a support transversely connected to the rear portions of the burner conduits and movably supported on the ledges of the supporting frame, and means to support the front portion of the burner.

CARL Gr. CRONl/VALL.

Vitnesses:

CHAS. C. TILLMAN, E. NEWSTROM.

Commissioner of Patents,

Washington, D. C. 

